NM_006888.6:c.426C>G

Variant names:

• chr14-90404693-C-G
• rs199744595
• NM_006888.6:c.426C>G

Variant summary

Our verdict is Likely pathogenic. Variant got 7 ACMG points: 7P and 0B. PM2 PP2 PP3_Moderate PP5_Moderate

The NM_006888.6(CALM1):​c.426C>G​(p.Phe142Leu) variant causes a missense change. The variant was absent in control chromosomes in GnomAD project. In-silico tool predicts a pathogenic outcome for this variant. Variant has been reported in ClinVar as Pathogenic (★).

• Frequency: Genomes: not found (cov: 33)
• Consequence: CALM1 NM_006888.6 missense
• Clinical Significance: Pathogenic criteria provided, single submitter P:2
• Conservation: PhyloP100: 4.72

Genes affected

CALM1 (HGNC:1442): (calmodulin 1) This gene encodes one of three calmodulin proteins which are members of the EF-hand calcium-binding protein family. Calcium-induced activation of calmodulin regulates and modulates the function of cardiac ion channels. Two pseudogenes have been identified on chromosome 7 and X. Multiple transcript variants encoding different isoforms have been found for this gene.A missense mutation in the CALM1 gene has been associated with ventricular tachycardia.[provided by RefSeq, May 2020]

ENSG00000258424 (HGNC:):

ACMG classification

Verdict is Likely_pathogenic. Variant got 7 ACMG points.

• PM2: Very rare variant in population databases, with high coverage
• PP2: Missense variant in the CALM1 gene, where missense mutations are typically associated with disease (based on misZ statistic). The gene has 16 curated pathogenic missense variants (we use a threshold of 10). The gene has 5 curated benign missense variants. Gene score misZ: 3.051 (below the threshold of 3.09). Trascript score misZ: 3.5833 (above the threshold of 3.09). GenCC associations: The gene is linked to long QT syndrome, catecholaminergic polymorphic ventricular tachycardia 4, long QT syndrome 14, catecholaminergic polymorphic ventricular tachycardia.
• PP3: MetaRNN computational evidence supports a deleterious effect, 0.903
• PP5: Variant 14-90404693-C-G is Pathogenic according to our data. Variant chr14-90404693-C-G is described in ClinVar as [Pathogenic]. Clinvar id is 183231.Status of the report is criteria_provided_single_submitter, 1 stars.

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	MANE	Protein	UniProt
CALM1	NM_006888.6	c.426C>G	p.Phe142Leu	missense_variant	Exon 6 of 6	ENST00000356978.9	NP_008819.1
CALM1	NM_001363670.2	c.429C>G	p.Phe143Leu	missense_variant	Exon 6 of 6		NP_001350599.1
CALM1	NM_001363669.2	c.318C>G	p.Phe106Leu	missense_variant	Exon 6 of 6		NP_001350598.1

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	TSL	MANE	Protein	Appris	UniProt
CALM1	ENST00000356978.9	c.426C>G	p.Phe142Leu	missense_variant	Exon 6 of 6	1	NM_006888.6	ENSP00000349467.4

Frequencies

GnomAD3 genomes Cov.: 33

GnomAD4 exome Cov.: 28

GnomAD4 genome Cov.: 33

ClinVar

Significance: Pathogenic

Submissions summary: Pathogenic:2

Revision: criteria provided, single submitter

Submissions by phenotype

Long QT syndrome 14 Pathogenic:2

Mar 05, 2013

OMIM

Significance: Pathogenic

Review Status: no assertion criteria provided

Collection Method: literature only

- -

Jul 22, 2020

SIB Swiss Institute of Bioinformatics

Significance: Pathogenic

Review Status: criteria provided, single submitter

Collection Method: curation

This variant is interpreted as pathogenic for Long QT syndrome 14, autosomal dominant. The following ACMG Tag(s) were applied: Absent from controls (or at extremely low frequency if recessive) in Exome Sequencing Project, 1000 Genomes Project, or Exome Aggregation Consortium (PM2); Prevalence in affected individuals statistically increased over controls (PS4 downgraded to supporting); Multiple lines of computational evidence support a deleterious effect on the gene or gene product (PP3); Assumed de novo, but no confirmation of paternity and maternity (PM6) (PMID:26969752); Well-established functional studies show a deleterious effect (PS3) (PMID:28158429; 23388215; 26164367); Located in a mutational hot spot and/or critical and well-established functional domain (e.g., active site of an enzyme) without benign variation (PM1). -

Computational scores

Source: dbNSFP v4.3

Name	Calibrated prediction	Score	Prediction
BayesDel_addAF	Pathogenic	0.33	D
BayesDel_noAF	Pathogenic	0.24
CADD	Pathogenic	26
DANN	Uncertain	1.0
Eigen	Uncertain	0.66
Eigen_PC	Pathogenic	0.67
FATHMM_MKL	Pathogenic	0.97	D
LIST_S2	Benign	0.73	.;T;.;.;.
M_CAP	Pathogenic	0.63	D
MetaRNN	Pathogenic	0.90	D;D;D;D;D
MetaSVM	Uncertain	-0.057	T
PrimateAI	Pathogenic	0.92	D
PROVEAN	Uncertain	-3.3	D;D;.;D;D
REVEL	Uncertain	0.56
Sift4G	Uncertain	0.019	D;D;D;D;D
Polyphen		0.95	.;P;.;.;.
Vest4		0.90
MutPred		0.66		.;Loss of catalytic residue at F143 (P = 0.0075);.;.;.;
MVP		0.98
MPC		2.5
ClinPred		1.0	D
GERP RS		5.5
Varity_R		0.93
gMVP		0.98

Splicing

Name	Calibrated prediction	Score	Prediction
SpliceAI score (max)		0.060		Details are displayed if max score is > 0.2

Find out detailed SpliceAI scores and Pangolin per-transcript scores at spliceailookup.broadinstitute.org

Publications

LitVar

Other links and lift over

dbSNP: rs199744595; hg19: chr14-90871037;